this is a professional answer

来源: 用户名被占用了 于 2011-02-23 17:45:57 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)
回答: The answer is radiosonde. See the following link. 由 shortstop 于 2011-02-23 14:13:09

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• I doublt if there is an amateur answer -shortstop- ♂ 给 shortstop 发送悄悄话 (222 bytes) () 02/23/2011 postreply 18:16:24

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